Cranks/no start condition

I started with the three basic steps, spark, fuel and air. It seemed like it was not getting gas. Put on my fuel pressure on the Schrader valve turned the key to on 21 psi for prime cranking engine was 25 psi. I changed fuel filter it was clogged bad/replaced/no start/tested it again this time it was 10 psi. Cranking same fuel pump was coming on koeo, you turn the key off the pump ran for three to four seconds. I changed the fuel pump and still no start. The fuel pressure tester is good. I tried it on two other cars, I primed it three to four times gas spraying out of Schrader valve on my arms, seat, a lot. Any help? If spark is next/how? Please it is a Vortec engine. Also, if this helps, the guy I got this from said there was a check engine light on for two months. He had it cleared before I bought it. It was a EVAP code. Help me guys, Steve, Ken. Thank you, brotherbuzz.